Step 1: Open your web browser and enter router’s IP address (192.168.1.1 by default) in the address bar. Enter username (blank by default) and then password (“admin” by default)

Step 2: Click Applications & Gaming--> Single Port Forwarding tab.

You enter a name what you like for the port forwarding. (eg: Camera01)
Enter camera’s HTTP port number in External Port and Internal Port, select TCP for Protocol. (eg: 8090)
Enter camera’s IP address and check Enable box. (eg: 192.168.1.190)
After completing all the necessary entries, go to the bottom and click Save Settings.